look up anything, like your first name:
1. The Gentlemen's Tap
An efficient gesture of respect

While receiving oral sexual intercourse, when the male partner is almost there, he should tap her/him gently on the shoulder, to let the other know.
James: Shannon doesn't really like semen and I respect her wishes

Oliver: But what do you do when she's giving you head?

James: Oh , easy i just use the Gentlemen's tap
rss and gcal